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UBC Theses and Dissertations

Fluxgate sensors for a spinner magnetometer Krider, Robert E.


Noise sources in a Schonstedt spinner magnetometer, the primary laboratory instrument used in paleomagnetic research, and various methods for dealing with them are investigated theoretically and experimentally. Based on the results, an instrument is designed and constructed which replaces the Schonstedt sensor and magnetometer with the recently developed University of British Columbia ring core sensor and magnetometer, and the Schonstedt analyzer with an adaptive filter. A 10dB improvement in the signal to noise ratio was achieved in the magnetometer, and a superior method for measuring this signal, using software, is suggested. A technique for faster noise reduction using a time-varying filter is developed analytically.

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